Building Time Aware Applications in RDF

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01-22-2009

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Building Time Aware Applications in RDF

HPL-2009-6 Building Time Aware Applications in RDF - McBride, Brian
Keyword(s): semantic web, temporal RDF, temporal query, temporal modeling, temporal application.
Abstract: Several techniques for using RDF to model change over time in a domain are reviewed and a new approach with a lower triple count than previous approaches is described. It is argued that the application programmer requires tool support so that she does not have to deal with the details of the modelin ...
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rdf::query::federate

RDF::Query::Federate(3pm)				User Contributed Perl Documentation				 RDF::Query::Federate(3pm)

NAME

       RDF::Query::Federate - A subclass of RDF::Query for efficient federated query execution.

VERSION

       This document describes RDF::Query::Federate version 2.908.

SYNOPSIS

	my $service = RDF::Query::ServiceDescription->new( $url );
	my $query = new RDF::Query::Federate ( $sparql );
	$query->add_service( $service );
	my $stream = $query->execute();

DESCRIPTION

       ...

METHODS

       "new ( $query, \%options )"
       "new ( $query, $base_uri, $languri, $lang )"
	   Returns a new RDF::Query::Federate object for the specified $query.	The query language defaults to SPARQLP, but may be set
	   specifically by specifying either $languri or $lang, whose acceptable values are:

	     $lang: 'rdql', 'sparql11', or 'sparql'

	     $languri: 'http://www.w3.org/TR/rdf-sparql-query/', or 'http://jena.hpl.hp.com/2003/07/query/RDQL'

       "add_service ( $service_description )"
	   Adds the service described by $service_description to the query's list of data sources.

       "services"
       "algebra_fixup ( $algebra, $bridge, $base_uri, $ns )"
	   Called in the fixup method of ::Algebra classes, returns either an optimized ::Algebra object ready for execution, or undef (in which
	   case it will be prepared for execution by the ::Algebra::* class itself.

AUTHOR

	Gregory Todd Williams <gwilliams@cpan.org>

perl v5.14.2							    2012-01-31						 RDF::Query::Federate(3pm)

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